21000012002022 has 8 divisors (see below), whose sum is σ = 42000024004056. Its totient is φ = 7000004000672.

The previous prime is 21000012002009. The next prime is 21000012002023. The reversal of 21000012002022 is 22020021000012.

It is a sphenic number, since it is the product of 3 distinct primes.

21000012002022 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21000012001989 and 21000012002007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000012002023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1750001000163 + ... + 1750001000174.

It is an arithmetic number, because the mean of its divisors is an integer number (5250003000507).

Almost surely, 2^{21000012002022} is an apocalyptic number.

21000012002022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21000012002022 is a wasteful number, since it uses less digits than its factorization.

21000012002022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500002000342.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21000012002022 its reverse (22020021000012), we get a palindrome (43020033002034).

The spelling of 21000012002022 in words is "twenty-one trillion, twelve million, two thousand, twenty-two".